(通用版)2019版高考数学二轮复习第一部分第二层级重点增分专题一函数的图象与性质课件理(普通生).ppt

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依据条件找到函数满足的性质,利用该性质求解,利用函数 性质求值,“分段处理”,采用代入法列出各区间上的方程,求参数,根据分段函数中自变量取值范围的界定,代入相应的解析式求解,但要注意取值范围的大前提,解不等式,分别求出每个区间上的最值,然后比较大小,求函数 最值,弄清自变量所在区间,然后代入对应的解析式,求“层层套”的函数值,要从最内层逐层往外计算,求函数值,从图象的左右、上下分布,观察函数的定义域、值域,知图选式,从函数的定义域,判断图象的左右位置;从函数的值域,判断图象的上下位置,知式选图,从函数的单调性,判断图象的变化趋势,从函数的奇偶性,判断图象的对称性,从函数的周期性,判断图象的循环往复,从图象的变化趋势,观察函数的单调性,从图象的对称性方面,观察函数的奇偶性,从图象的循环往复,观察函数的周期性,利用周期性可以转化函数的解析式、图象和性质,把不在已知区间上的问题,转化到已知区间上求解,周期性,可以比较大小、求函数最值、解不等式、证明方程根的唯一性,单调性,具有奇偶性的函数在关于原点对称的区间上其图象、函数值、解析式和单调性联系密切,研究问题时可转化到只研究部分(一半)区间上尤其注意偶函数f(x)的性质:f(|x|)f(x),奇偶性,谢谢观看,

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